A Novel Magnetic Coupler with PQI Cores for Wireless Power Transfer

Procedia Computer Science Pub Date : 2024-01-01 DOI:10.1016/j.procs.2024.08.051

Xiaokun Li , Junwei Lu , Haoran Wang , Jingda Li

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Abstract

The magnetic coupler is a key component of the wireless power transfer (WPT) system, which greatly affects the performance of the WPT. This paper proposes a novel magnetic coupler with ferrite PQI cores for the WPT of small drones, which can enhance the magnetic coupling and improve power transfer efficiency. This magnetic coupler includes the transmitting (T_X) side and receiving (R_X) side. The T_X side is made of a helical coil and a ferrite PQ core; and the R_X side is made of a helical coil and a ferrite I core plate. Finite element simulations are used to investigate the performance of the proposed magnetic coupler with PQI cores, and compare it with a conventional planar magnetic coupler with two I core plates. In addition, an experimental platform is built to prove the validity of the proposed magnetic coupler with PQI cores. The results show that the coupling coefficient can reach 0.97, and it can exceed 0.446 even under the worst coupling conditions. Meanwhile, power transfer efficiency increases by 10.3% using the magnetic coupler with PQI cores.

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带 PQI 磁芯的新型磁耦合器用于无线电力传输

磁耦合器是无线电力传输（WPT）系统的关键部件，对 WPT 的性能影响很大。本文提出了一种用于小型无人机 WPT 的新型铁氧体 PQI 磁芯磁耦合器，它可以增强磁耦合，提高功率传输效率。这种磁耦合器包括发射（TX）端和接收（RX）端。发射端由螺旋线圈和铁氧体 PQ 磁芯组成；接收端由螺旋线圈和铁氧体 I 型磁芯板组成。我们使用有限元模拟来研究带有 PQI 铁芯的拟议磁耦合器的性能，并将其与带有两个 I 型铁芯板的传统平面磁耦合器进行比较。此外，还搭建了一个实验平台来证明所提出的 PQI 磁芯磁耦合器的有效性。结果表明，耦合系数可达 0.97，即使在最差的耦合条件下也能超过 0.446。同时，使用带 PQI 磁芯的磁耦合器，功率传输效率提高了 10.3%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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